Fastening device



7 April 1946. E. GlSONDl 2,398,784

FASTENING DEVICE Filed Oct. 23, 1944 INVENTOR GJLSoncZzl 7 BY v Patented Apr. 23; 1946 FASTENING Dawes Emanuel Gisondi, Larchrnont, N. :Y. J v .npplication ctober23, 1944,, seriaiNo. 559.345 A new n- ".This 'lnven'tion relates to fasteners, and more" particularly tothose intended forsecuring articles-or materials to walls or other surfaces composed of sheet material, andfor securing'several layers of sheet material together. w i

The invention contemplates the provision of a fastener, preferablymade from sheet metal or the like, which isextended through a hole. or opening in the" sheet material and is adapted to have prongs or other suitably shapedparts bent over at the rear of the sheet material, the bending-over action beingsecured from the exposed or outer face of the wall and solely by the insertion and threading of a screw or other threaded element into the. fastener.

An object of the invention is to provide a fas-v tening means of this character which will accept wood screws as well as machine screws or other threaded elements; which is not critical as to such as sh'eet steelfand is provided with a-c'entral, disklikeportionfl, which forms the' head a of "the fastener) and which is provided with a' central screw-hole 2,-through which a screwZlf or other threaded member is adapted to pass. j Extending radially fron'i'the head I is a pairfof diametrically opposite-relatively short tongues 3 and 4, each of which -isj bent inwardly and the invention, a more particular description of which'will appear hereinafter and be set forth inthe'claims appended hereto.

In the accompanying drawing in which several embodiments of the, invention are shown, .Fig. 1 is aface view of a blank from which the improved fastener is made;Fig. 2 is a sideview of the fastener, with a portion of the same adjacent to the head of the device shown in section; Fig. 3 is a sectional view through the fastener, showing it in place in an aperture in sheet material and with the prongs being bent over by the 7 pressure of" a screw; Fig. 4 is a similar view, showing the screw fully inserted and the prongs being in the final position of bend, and disposed against the back face of thesheet material; Fig. 5 is a perspective view of the fastener; Fig. 6 is a face view of a blank from which another embodiment of "the invention is made; Fig. 7 is a vertical sectionalviewthrough "a fastener made from the blank ofFig. 6; Fig.8 is a vertical sectional view-through the fastener of Fig. '7, the View being taken at right angles to that of Fig. 7; and Fig. 9 is a sectional view showing the fastener of-Fi'g's. 7 and'8 in place. V

"The blank from which thefastener shown in thenceup'wardly on the fold-lines 5 and 6 to thereby reinforce the head at the back and then extend rearwardlytherefroin. These two tongues have their-respectiveends I and 8 curved inwardly or toward one'another to engagewiththe thread on the screw 2| when the screwfi's inserted through the screw-hole 2.. v

Als'o extending radially from the head pair of diametrically opposite lengthy tongues or strips 9 and lfl having their axis'located at" right angles tothat of the tongues '3 and-4. Each of'thelong tongues or strips 9 and Hi is bent inwardly and then upwardly on the two fold lines II and I2 to reinforce the head andthen provide a pair of relatively lengthy parallel prongs extending rearwardly from the back of the head, as clearly seen in Figs. 2 and 5. Each of the prongs so formed is transversely bent or doubled'upon itself, as indicated at l3, to' thus provide an outer or free-end portion of double thickness, the inner ply of which is-indi'catedat l4 on the tongue 9, and at Ida on the tongue l0.

These inner portions l4 and Ma are'e'ach bent on .theline' l5 thus providingthe part M with an in-- wardly extending lug portion 16, and the part Ma r material, or through a number of layers ofsheet I material if it is intended that the fastener shall secure together a number of layers or'plie's. For

an elongated section of resilient sheet 'metal',

simplicity in illustration a single thickness of sheet material is shown at 20.'

The fasteneris inserted through the hole in. the'sheet material until the hea'dfl ofthe fastener comes into contact-with the face .of'the" same The prongs 9 and 10 are of such length relative to the'thickness of-the material through whichthey new examiner-when the fastener lis a position, ah'ole or to be continued through the fastener.

ed shank, Wil1 he-,, e seeed by he ihtur edsh t ton u s h hold e h ii g aeeg and permitting itsio'rwa'rd threading movement AS the screw progresses through the fastener, its pointed end or tip will necessarily come into'contact with the first of the lugs, indicated at 1,1,, and as the screw exerts pressure on thes overlying lugs l6 and I1, it will start to. bend the prongs a and I outwardly or in a direction away fromone, another. This bending action occurs at the point of in e th ckness, of each niche ust where the prone; emerges. rom th sheet materia 211;: ac lita hemift ardl. bend n of the pron s. in

. the mann desc i h da datt enroper point, r

that. ind ated at ZZ ihF ao 3, ach, eithenron s a d I may he-sh tab y ne hedsor o,t .,erwi.se akene esihd eated a 1.

s. rtheninward th eadin m vement f th r w c n n ed he. scr rces. thep Qn -s veromp e e y o a os t on; ainst the re r: o 30 he he t m e a Z0--u t .1.- the ron s-V are ent. o erii -m ya a n t; the bath Q i he s me. At h ime t w l h bseif ditha he u sl6 @Zlli'l a e been spre d apart ohh et Q s ch X-- tent that their xtreme end er: ihsare in. lien en a me t; aeahist the th zeade ortionof t e s re hes -lu s exe t 7 .1 t pr sure on the s rew and; ncho t. irm y nd. n ht it r m hthre siihe, or hif in onu in t t ma h a r fas enin mt r e r ma erial to he ex osed ace i the m terialhi he as ener is: RQWSIQ? cu e y an h ed,

S n e he shee ma r al: Zlli newfirmly eon:- ned: b t e h-thehead l and theh ht OYQEPQI- ehs ofthe pron s, 9 nd t he fastener n t; ly r s eheh hprase or s re 1703 .622 threade 1 memheh. ut. als Serves,- tehq ii; s er l: y r o he h et ma et ltegeth h t the me: terallh e h s rel a ers.

In.- th embod ment of; h nvention: disclosed; E e- 6 t cl siv he; ormed. r m the b an This hla t h s he central disk-portion or; head; i as; des oegl re-n peet o the e ee t E eand a1so-hes1 hen ues tend: tm structed h- Theteneues' ehd ieivtf e, e h l t len t e y 0 pa le i es icpa de :31a 4; to prov de a. onal-1e w en them.- Eech: tensi e 25 h s a; thee end 21 which is t ens et y bent et a that when; the two tongues 9 and I0 constitu gprongs f; fast er are ex nd d reehw rdiy end g ate n sp ed. pa a ele io he Parts 2 th 601k itute lu s similar to h e shown li ht 2 :v hand di at d. h rein ,16- ehsi 't I e h e e fo med rom e b a k: El e-e s ow n, pe tive pe itieht whetm il :v e seen that t two ron -send I eYeeht e er n he mann -S milar t e p o gs, & an l o he f t m odime tor the hvehtiehi tZ-wih; e e ene d. ha heehehe etti e s t he ut 2- he plane he p ong t and; til-e e ea e h se l w h ee e e h e e i i hhs e g filmt eheasi-ngtheezew To, eeiha tate bending of the prongs 9 and IU of this embodiment, the parts of the prongs located along the longitudinal edges of the tongue portions 25 may be corrugated as shown at 28.

While I have shown several embodiments of the invention, it is obvious that the same may be modified in many particulars to suit difierent requirements. In any case, the installation is simple since the device is simply thrust through an h n i iei hema li hwhiehi s s p h held; he sat h e tes eeheei ed it the 3and 4 to engage the" thread of the screw;

threading of the screw is continued to the extent required, such threading movement serving to "bend over the prongs of the fastener at the back of the material through which it is extended. The serew maysbe withdrawn whenever desired, but it will not loosen inadvertently since it is securely. and resiliently engaged by the tongues 3 and '4 and the lugs l6 and I1. Since the lugs and tongues-are resilient; several sizes. at screw may be I accommodated, thus, eiiablir g;the device to; be

put-to many-uses with standard ypes eiserews.

or other threaded membersi- What I claim is:- 1. A fastener of thercharacter described 09mprising, a sheet metal member provided. with a,

head; a pair of prongs extending rearwardly and in spaced relation from the. head, each pronghaving an inturned: portion located inwardly from its end, the inturned portion;ononeiprong lyin in overlapping relation to the. inturned: part on the other prong at a point remote from the ends ofthe prongs, the head having an opening I through which a threaded membei is extended to cause theend: of: the sametoexert pressure upon the intur-ned, overlapped parts; of the prongs at points remote from theends o-ffthe' prongs andcausesaid pron-gs; to'bend' outwardly'andaway from one another.

2-. A fastener of the character described comprisin a head, integral prongs extending at; sub-. stantially right angles to the plane of the head, each prong havingan inturned lug locatedibeen the. e d Of'the orleh ahdi e h ad. th

' etwe n hem, uch preading movement, of th lugs. ceusi ethe DEQDgS: tot-be hent outwardly and,

wa 1 Qhe aholt en 3 A iastehe oi he cha cter desc ib dprising, ahea a pair oi spac d, natellel prongs.

s e a, s ew whie gwhen; extended thro gh.

the cr i l: ee re eth Ines; ahdicau e he pmh s, o bend v oven, nd int n X endin from the; h a a.

e prQhee et en ageme t e te Y 4. A fastener of;

ankfei the cha t ti he deter 'h dv com:

of prongsestehdih i h her he'a se h le; t hi h pasted. e stensthetwe h therprengax at; least two of the prongs each having a curved inturned lug located inwardly from its end, the lug on one prong overlapping that on the other prong, the

two overlapped lugs bridging the space between the two prongs on Which they are provided at points remote from the ends of said prongs, whereby a screw, when passed through the screwhole, will spread the lugs apart and cause the prongs on which said lugs are provided to bend over.

5. A fastener of th character described comprising, a head, a pair of prongs extending rearwardly therefrom, each prong having a lug portion inwardly of it free end, the lug portions being overlapped between the prong and away from the ends thereof, the head having a hole through which a threaded member is passed to engage against the overlapped lugs to pass between the same and cause the prong on which they are formed to become bent over at points between the lugs and the head and behind the material through which the fastener is inserted.

6. A fastener of the character described, comprising, a disk-like head provided with a screwhole, at least two prongs formed integrally with the head and bent to extend rearwardly of the same, said prongs extending normally in parallel relation, each prong being provided with an inbent portion directed toward its companion prong, said inbent portions constituting lugs disposed in overlapped relation and located inwardly from the free end of each of the prongs and bridging the space between the prong at points between the ends of th prongs and the head and located in the path of a screw passed through the screwhole in the head, whereby said screw will contact said lug portions before said screw reachesthe ends of the prongs and force them apart and cause the prong to separate and become bent over at the back of the material through which the fastener is inserted.

7. A fastener of the character described in claim 6, wherein the prongs are provided with weakened bending points to determine the point on which each prong will bend when the screws portion of the prong being inturned to form a lug extending in a direction toward its companion prong, the lugs on the two prongs being overlapped between the prongs, the head having a.

screw-hole for receiving a screw which, when extended through the screw-hole, will engage against the lugs and force them apart and cause the prong to be bent over at points where the prongs are of single thickness.

9. A fastener of the character described in claim 8, wherein the prongs are provided with weakened bending points in said single-thickness areas.

10. A fastener of the character described comprising, a sheet-metal member having a head, a pair of integral prong extending rearwardly of the head, each prong being longitudinally slit and apertured to produce a struck-out spring portion in each tongue, each spring portion having an inbent free end, the inbent free end on one spring portion overlying that on the other spring portion, the head having a screw-hole for receiving a screw which, when extended through the screwhole will engage the inbent ends and force the prong apart and cause them to become bent over.

11. A fastener of the character described in I claim 10, wherein the head is provided with a pair exert pressure against the lug portions on said of inbent short tongue located between the prong and having their ends operative against the shank of the screw.

12. A fastener of the character described in claim 10, wherein portions of the prongs along the side edges of the spring portions thereof are corrugated to aid in causing the prong to bend at selected points under the pressure imposed by the screw.

13. A fastener having a head formed with a pair of rearwardly extending prongs located in spaced relation, each prong having a laterally extending lug located between its free end and the head and extending in a direction toward the other prong, whereby said lugs lie in overlapped position between the two prongs between the head and ends of the prongs, the head having a screw hole located between the prongs so that a crew passed through said hole will contact the overlapped lug and force them apart sufficiently to pass between them, said screw when forcing the lugs apart acting to cause outward bending separation of the prong at points remote from the free ends of said prongs.

EMANUEL GISONDI. 

